Unit 1
Why is water considered a polar molecule?
Because oxygen has a higher electronegativity than hydrogen
Why are cells small?
To increase surface area-to-volume ratio
Cell signaling begins with
reception
Meiosis results in:
Four haploid cells
DNA replication occurs during?
Interphase
Which property of water allows plants to transport water upward?
Cohesion and adhesion
Which structure is found in plant cells but NOT animal cells?
cell wall
Negative feedback results in:
Reduced response
Crossing over increases:
genetic diversity
Which RNA carries amino acids?
trna
DNA and RNA are classified as:
nucleic acids
Which transport method requires ATP?
Active transport
During which phase does DNA replicate?
s
A heterozygous genotype is
Aa
Translation occurs at the:
ribosomes
Which macromolecule provides long-term energy storage?
lipids
Where does glycolysis occur?
cytoplasm
Which signaling molecule binds to a receptor?
ligand
What happens in incomplete dominance?
Traits blend
what is a mutation
change in dna sequence
Which element is found in all organic macromolecules?
Carbon
Which organelle modifies and packages proteins?
Golgi apparatus
Signal transduction pathways often involve:
Protein phosphorylation
During which phase do homologous chromosomes pair?
Prophase I
Gene regulation allows cells to
Specialize in function